syzkaller login: [ 34.353448] BUG: Bad rss-counter state mm:00000000de493f40 type:MM_FILEPAGES val:32 [ 34.354666] BUG: Bad rss-counter state mm:00000000de493f40 type:MM_ANONPAGES val:22 [ 34.395410] ================================================================== [ 34.396514] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 34.397575] Read of size 8 at addr ffff888016a15058 by task sshd/218 [ 34.398457] [ 34.398727] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 34.399764] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 34.400890] Call Trace: [ 34.401286] [ 34.401573] dump_stack_lvl+0x91/0xf0 [ 34.402071] print_report+0xcc/0x620 [ 34.402699] ? __virt_addr_valid+0x102/0x340 [ 34.403273] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.403902] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.404533] kasan_report+0xbe/0xf0 [ 34.405015] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.405641] vma_interval_tree_remove+0xc75/0xec0 [ 34.406247] vma_prepare+0xc54/0x11a0 [ 34.406731] __split_vma+0x5af/0x950 [ 34.407215] ? __pfx___split_vma+0x10/0x10 [ 34.407742] ? find_held_lock+0x2c/0x110 [ 34.408291] do_vmi_align_munmap+0x2ba/0x11f0 [ 34.408856] ? lock_is_held_type+0x9f/0x120 [ 34.409395] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 34.410014] ? mtree_range_walk+0x632/0x900 [ 34.410573] ? mas_walk+0x5c7/0x7c0 [ 34.411055] do_vmi_munmap+0x1f1/0x2b0 [ 34.411557] mmap_region+0x1f9/0x2660 [ 34.412059] ? vm_mmap_pgoff+0x15c/0x3a0 [ 34.412571] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 34.413287] ? __pfx_lock_acquire+0x10/0x10 [ 34.413819] ? __pfx_mmap_region+0x10/0x10 [ 34.414349] ? security_mmap_addr+0x7d/0xa0 [ 34.414882] ? get_unmapped_area+0x1f5/0x3f0 [ 34.415431] do_mmap+0x854/0xf00 [ 34.415881] vm_mmap_pgoff+0x1a6/0x3a0 [ 34.416391] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 34.416954] ksys_mmap_pgoff+0x3af/0x500 [ 34.417477] do_syscall_64+0x3f/0x90 [ 34.417962] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.418622] RIP: 0033:0x7fac29d55d82 [ 34.419085] Code: eb aa 66 0f 1f 44 00 00 41 f7 c1 ff 0f 00 00 75 27 55 48 89 fd 53 89 cb 48 85 ff 74 33 41 89 da 48 89 ef b8 09 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 56 5b 5d c3 0f 1f 00 c7 05 ae 03 01 00 16 00 [ 34.421217] RSP: 002b:00007fff86da6e08 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 34.422134] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fac29d55d82 [ 34.423003] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fac2918f000 [ 34.423854] RBP: 00007fac2918f000 R08: 0000000000000009 R09: 0000000000001000 [ 34.424723] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558be4f4af70 [ 34.425576] R13: 00007fff86da6e20 R14: 00007fff86da6e50 R15: 00007fff86da71b0 [ 34.426439] [ 34.426737] [ 34.426956] Allocated by task 211: [ 34.427385] kasan_save_stack+0x22/0x50 [ 34.427904] kasan_set_track+0x25/0x30 [ 34.428411] __kasan_slab_alloc+0x59/0x70 [ 34.428942] kmem_cache_alloc+0x16b/0x370 [ 34.429458] vm_area_dup+0x20/0x160 [ 34.429912] __split_vma+0x170/0x950 [ 34.430382] split_vma+0xc6/0x110 [ 34.430828] mprotect_fixup+0x8d2/0xb30 [ 34.431333] do_mprotect_pkey+0x87e/0xd40 [ 34.431868] __x64_sys_mprotect+0x78/0xc0 [ 34.432417] do_syscall_64+0x3f/0x90 [ 34.432891] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.433536] [ 34.433755] Freed by task 202: [ 34.434147] kasan_save_stack+0x22/0x50 [ 34.434653] kasan_set_track+0x25/0x30 [ 34.435152] kasan_save_free_info+0x2b/0x50 [ 34.435687] __kasan_slab_free+0x10a/0x190 [ 34.436234] kmem_cache_free+0x10d/0x4d0 [ 34.436757] rcu_core+0x8c8/0x2860 [ 34.437209] __do_softirq+0x1b7/0x7d4 [ 34.437723] [ 34.437939] Last potentially related work creation: [ 34.438533] kasan_save_stack+0x22/0x50 [ 34.439038] __kasan_record_aux_stack+0x8e/0xa0 [ 34.439615] __call_rcu_common.constprop.0+0x6a/0xb90 [ 34.440332] remove_vma+0x139/0x170 [ 34.440791] do_vmi_align_munmap+0xd4a/0x11f0 [ 34.441354] do_vmi_munmap+0x1f1/0x2b0 [ 34.441847] __vm_munmap+0x138/0x3a0 [ 34.442314] __x64_sys_munmap+0x59/0x80 [ 34.442827] do_syscall_64+0x3f/0x90 [ 34.443303] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.443950] [ 34.444178] The buggy address belongs to the object at ffff888016a15000 [ 34.444178] which belongs to the cache vm_area_struct of size 168 [ 34.445659] The buggy address is located 88 bytes inside of [ 34.445659] freed 168-byte region [ffff888016a15000, ffff888016a150a8) [ 34.447067] [ 34.447286] The buggy address belongs to the physical page: [ 34.447959] page:00000000f98cf899 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16a15 [ 34.449067] memcg:ffff888010078201 [ 34.449492] flags: 0x100000000000200(slab|node=0|zone=1) [ 34.450135] page_type: 0xffffffff() [ 34.450582] raw: 0100000000000200 ffff88800879fc80 ffffea0000331600 dead000000000006 [ 34.451499] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888010078201 [ 34.452405] page dumped because: kasan: bad access detected [ 34.453068] [ 34.453283] Memory state around the buggy address: [ 34.453870] ffff888016a14f00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 34.454731] ffff888016a14f80: 00 00 fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 34.455587] >ffff888016a15000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 34.456455] ^ [ 34.457185] ffff888016a15080: fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 [ 34.458037] ffff888016a15100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 34.458905] ================================================================== [ 34.459923] Disabling lock debugging due to kernel taint [ 36.914983] BUG: Bad rss-counter state mm:00000000098baaee type:MM_FILEPAGES val:33 [ 36.915993] BUG: Bad rss-counter state mm:00000000098baaee type:MM_ANONPAGES val:22 [ 37.389191] BUG: Bad rss-counter state mm:000000004c637504 type:MM_FILEPAGES val:33 [ 37.390173] BUG: Bad rss-counter state mm:000000004c637504 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:62049' (ECDSA) to the list of known hosts. 2023/06/20 02:13:24 fuzzer started 2023/06/20 02:13:24 dialing manager at localhost:44161 2023/06/20 02:13:24 checking machine... 2023/06/20 02:13:24 checking revisions... [ 38.099834] kmemleak: Automatic memory scanning thread ended 2023/06/20 02:13:24 testing simple program... [ 38.152189] cgroup: Unknown subsys name 'net' [ 38.215304] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:13:20 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88800f127aa0 RCX=ffff88800f127a78 RDX=1ffff11001e24f56 RSI=ffffffff813ad6d0 RDI=ffff88800f127ab0 RBP=ffff88800f127a70 RSP=ffff88800f1279b8 R8 =0000000000000001 R9 =ffff88800f127a18 R10=0000000000038001 R11=0000000000003c0d R12=ffff88800f127aa0 R13=0000000000000000 R14=ffff888019e29b40 R15=ffff88800e252c38 RIP=ffffffff813ad446 RFL=00000296 [--S-AP-] CPL=0 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA] SS =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fe663c25900 00000000 00000000 GS =0000 ffff88806ce00000 00000000 00000000 LDT=0000 fffffe0000000000 00000000 00000000 TR =0040 fffffe0000003000 00004087 00008b00 DPL=0 TSS64-busy GDT= fffffe0000001000 0000007f IDT= fffffe0000000000 00000fff CR0=80050033 CR2=00007ffd628aa000 CR3=000000000c64a000 CR4=00350ef0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 EFER=0000000000000d01 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 XMM00=23232323232323232323232323232323 XMM01=ffffffffffffff00ffff000000000000 XMM02=ffffffffffffff00ffff000000000000 XMM03=6c69662065687420666f20656e696c20 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=0000ffffffffffffffffffffffffffff XMM08=00000000000000810000363532616873 XMM09=00000000000000000000000000000000 XMM10=00002020202020200020202020202020 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c58400 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=1 ES =0000 0000000000000000 00000000 00000000 CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA] SS =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 0000000000000000 00000000 00000000 GS =0000 ffff88806cf00000 00000000 00000000 LDT=0000 fffffe0000000000 00000000 00000000 TR =0040 fffffe000004a000 00004087 00008b00 DPL=0 TSS64-busy GDT= fffffe0000048000 0000007f IDT= fffffe0000000000 00000fff CR0=80050033 CR2=00007f3e2cc45930 CR3=000000000de98000 CR4=00350ee0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 EFER=0000000000000d01 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 XMM00=33313a3230203032206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3732325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320323638 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000